Tellabs 6047 Manual

'irtellabs
technical manuai
76-826047A
rev B
practice section 816047/826047A
©Tellabs, Inc., 2 October 1983
all rights
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--..
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'1rinted in USA
6047 and 6047A 4Wire-to-4Wire SF-to-E&M
Network Terminating Modules
page 1
page 3
page 9
page 14
page 22
page
18
page
19
contents
section 1 general description
section 2 application
section 3 installation
section 4 circuit description
section 5 block diagram
section 6 specifications
section 7 testing and troubleshooting
1.01 general description
1.01 The 6047 4Wire-to--4Wire SF-to-E&M Net-
work Terminating Module with Gain and the 6047A
4Wire-to--4Wire SF-to-E&M Network Terminating
Module with Gain and Loopback (figure 1) each
provide signaling and transmission interface be-
tween a 4wire facility that uses single-frequency
(SF) signaling and a 4wire trunk (typically, a PBX
trunk) or a 4wire line that uses E&M signaling. Both
modules provide active level control in the transmit
and receive paths, receive-path amplitude equal-
ization, and full-duplex conversion between the SF
signaling on the facility and the E&M signaling on
the trunk or line. Conventional 2600Hz SF tone is
supplied by an integral oscillator. The 6047 and
6047A differ from ordinary 4wire E&M SF signaling
sets in that they contain integral amplifiers to
accommodate a variety of facility interface levels.
Unlike the 6047, the 6047A contains integral loop-
back circuitry that facilitates local or remote testing
of both the module and the facility. As members of
Tellabs' 262U Universal Network Terminating Sys-
tem of modules and enclosures, the 6047 and
6047A each fulfill Registered Facility Interface
Codes TC31 E, TC31 M, TC32 E, TC32 M, TL31 E,
TL31 M, TL32E, and TL32M for network-terminating
applications where the serving telephone company
uses SF signaling.
1.02 In the event that this practice section is re-
issued, the reason for reissue will be stated in this
paragraph.
1.03 Features and options of the 6047 and
6047A include the following: full prescription align-
ment capability; balanced, switchable 1200, 600, or
150-ohm terminating impedances on the facility
side; fixed, balanced 600-ohm terminating imped-
ances on the terminal side; facility-side amplifiers
and terminal-side attenuators for interface with a
variety of levels; active slope-type receive equaliza-
tion; switch-selectable A-side or B-side E&M signal-
ing; switch-selectable Type I, II, or III E&M interface;
minimum-break transmit and receive pulse correc-
tion; and an integral sealing-current source. The
6047A alone contains the aforementioned loop-
back circuitry with both local (manual) and remote
(two-tone) loopback-state control. Except for this
difference, the two modules are identical.
page 1
figure
1.
6047 and 6047
A 4
Wire-to-4 Wire
SF-to-E&M Network Terminating Modules
1.04 Prescription-set transmit and receive ampli-
fiers on the facility side of the 6047 and 6047A
allow each module to interface the SF signaling
facility directly, i.e., without a separate facility-side
line amplifier. These integral amplifiers, in conjunc-
tion with prescription-set transmit and receive
attenuators on the terminal side, provide for full
coordination between facility-side and terminal-
side levels. Both facility-side amplifiers on each
module provide from 0 to 24dB of gain in switch-
selectable O.ldB increments, and both terminal-
side attenuators provide from 0 to 24dB of loss in
switch-selectable 0.1 dB increments. In the receive
channel, input TLP's (transmission level points)
from -17 to +7 can be accommodated and output
TLP's from +7 to -17 can be derived. In the
transmit channel, input TLP's from -16 to +8 can
be accommodated and output TLP's from +8 to
-16 can be derived. The overload point at all four
ports of the 6047 and 6047A is +5dBmO.
1.05 An active slope equalizer for non loaded
cable in the receive channel of the 6047 and
6047A permits from 0 to 7.5dB of equalized gain to
be introduced at 2804Hz (re 1004Hz) in switch-
selectable 0.5dB increments. Because this equal-
izer does not affect 1004Hz levels, equalization
can be introduced not only before but also after
receive-channel levels are set, with no interference
between level and equalization adjustments.
1.06 Transformer coupling is provided at all four
ports of the 6047 and 6047
A
The two facility-side
transformers on each module can be indepen-
dently switch-optioned for balanced 1200, 600, or
150-ohm terminating impedance, while the two